Sunan an-Nasa'i #5010
Sahih (Authentic)
Remembrance
مَثَلُ الَّذِي يَذْكُرُ رَبَّهُ وَالَّذِي لاَ يَذْكُرُ رَبَّهُ مَثَلُ الْحَيِّ وَالْمَيِّتِ
The Prophet (ﷺ) said: 'The similitude of the one who remembers his Lord and the one who does not remember his Lord is like that of the living and the dead.'
Chain of Narration (Isnad)
Narrated Abu Musa al-Ash'ari